abrahams



UNITED STATES PATENT OFFICE.

JOHN IVM. ABRAHAMS, OF ALLEGIIENY, PENNSYLVANIA, ASSIGNOR TO JOI-IN DAVIS, OF SAME PLACE.

SPECIFICATION forming part of Letters Patent No. 428,262, dated May 20, 1890. Application filed October 26, 1889. Serial No. 328,249. (No model.)

To all whom it may concern:

Beit known that I, JOHN WILLIAM ABRA- HAMS, a citizen of the United States, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Joints for- Rain-IVater Conductors; and I do hereby declare the following' to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to metallic tubing for rain-water conductors and other purposes, and has for its object certainimprovementsin the construction of the joints therefor, which will be hereinafter described, and particularly pointed out in the claim.

In the former constructions the seam is formed in the cylindrical or body portion of the conductor, and is exposed to the corrosive effect of the water which passes through it, and in the construction of the conductor requires the application of a device known as a seamer to form the seam after the free edges of the sheets of metal have been bent by a cornice-brake. By Iny present construction theseam or joint is formed wholly by the cornice brake, reduces the cost of manufacture one-third, and the joint is made in l[he eXpansible projection on the conductor, where buta small quantity of the water passing through the conductor can come in contact with it.

In the accompanyingdrawings, whichform part of this specification, Figure I represents a perspective of my improved conductor, and Fig. 2 is a cross-section thereof.

Reference being had to the drawings and the letters thereon, A indicates the waterconductor, which is made in sections of suitable length for convenience in handling, and is provided with an expansible and contractible projection B for preventing the body of the conductor lying or bearing against the wall of a building, and furnishes an elfective means for securing the conductor to a building by the use of suitable fastening devices.

In one of the walls or sides of the projection B is formed the brake-joint C, which connects the edges of the sheet of metal and forms a conductor. by bending the metal on one edge of the sheet, as shown at a, and the opposite edge, as at b, and in the latter bend the lnetal at c bears against the body or cylindrical portion of the conductor when the parts are interloclced, as shown in the drawings, and prevents t-he possibility of the joint opening accidentally in transportation or in handling the conductor in putting it in position on abuilding, or While in use on a building. After the sheet of metal has been bent into any desired form, such as are used for conductors, the edges a b areinterlocked and the joint O formed by placing the projection B in a cornice-brake and pressing the interlocking members closely upon each other, thus dispensing entirely with the use of the seamer in the manufacture of the conductor.

Having thus fully described my invention, what I claim is Metallic tubing having an expansible projection, and a joint or seam formed in the base of one side of the projection, and the fold of one of the members of the joint or seam bent down to or near the body of the tubing and the fold of the other member within the apex of the projection, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN WM. ABEAIIAMS.

Witnesses:

W. C. SLAUGHTERBECK, ADOLPHE I-I. BOCKING.

This joint is producedl 

